4S Lithium Battery Charging Protection Board - 14.8V, 20A

The 4S Lithium Battery Charging Protection Board is a BMS for 4S Li-ion/Li-Po battery packs with a nominal voltage of 14.8V and a continuous discharge current of 20A. It is designed to manage and protect lithium battery cells during operation and charging. The board includes overcharge protection, over-discharge protection, short-circuit protection, and balanced charging. It also supports cell balancing during charging to help maintain pack consistency. This protection board is suitable for battery packs made from four series-connected cells.

Features of 4S Lithium Battery Charging Protection Board - 14.8V, 20A

• 4S Li-ion/Li-Po support
• 14.8V nominal voltage
• 20A continuous discharge
• Overcharge protection
• Over-discharge protection
• Short-circuit protection
• Balanced charging
• Cell balancing during charging

Specifications of 4S Lithium Battery Charging Protection Board - 14.8V, 20A

• Nominal voltage: 14.8V
• Continuous discharge current: 20A
• Battery type: 4S Li-ion or Li-Po battery packs
• Protection features: overcharge protection, over-discharge protection, short-circuit protection, balanced charging
• Balancing current: up to 60mA per cell
• Operating temperature: -20°C to +60°C
• Overcharge voltage range: 4.25-4.35v±0.05v
• Over-discharge voltage range: 2.3-3.0v±0.05v
• Upper limit working current: 10A
• Working temperature: -40---+50 °C
• Upper limit instantaneous current: 20A
• Storage conditions: -40-- +80 ° C
• Quiescent current: less than 30uA
• Effective life: more than 50,000 hours
• Internal resistance: less than 100mΩ
• Short circuit protection: protection, charge recovery
• Charging voltage: 16.8V-17V

How to Use 4S Lithium Battery Charging Protection Board - 14.8V, 20A

1. Connect the power source to the voltage buck module.
2. Use a power supply of 16.8V for the 4-cell battery pack, with at least 18.5V input to the buck module.
3. Adjust the output voltage with a multimeter.
4. Set the multimeter to current mode and adjust the output current.
5. Connect the battery cells in order to the B-, B1, B2, B3, and B+ pads.

More Info

• This module does not perform charging on its own.
• P+ and P- are used as input and output.
• Do not short circuit the pads intentionally.
• Battery voltage, capacity, and internal resistance should be matched when assembling packs.
• Battery groups connected in series should have the same voltage before use.